Fee Preview

Preview the same fee engine used by settlement and billing before a deposit arrives.

`POST /v1/fee-preview`

Requires usage:read. The response includes platform fee, route cost, markup, the per-chain flat settlement gas fee (settlementGasFeeUsd, a 2-dp USD string like its sibling fields), net credit, invoice amount, and effective policy metadata. Live per-chain flat fees are also published unauthenticated via GET /v1/chains.

curlbash

curl -X POST https://api.projectsilo.app/v1/fee-preview \
  -H "Authorization: Bearer project_silo_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "sourceChainId": 8453,
    "sourceAsset": "USDC",
    "amount": "100.00",
    "destinationChainId": 137,
    "destinationAsset": "USDC.e",
    "routeCostUsd": 0.03
  }'